74666558620553 has 2 divisors, whose sum is σ = 74666558620554. Its totient is φ = 74666558620552.

The previous prime is 74666558620531. The next prime is 74666558620607. The reversal of 74666558620553 is 35502685566647.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72215120210704 + 2451438409849 = 8497948^2 + 1565707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74666558620553 is a prime.

It is not a weakly prime, because it can be changed into another prime (74666558620523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37333279310276 + 37333279310277.

It is an arithmetic number, because the mean of its divisors is an integer number (37333279310277).

Almost surely, 2^{74666558620553} is an apocalyptic number.

It is an amenable number.

74666558620553 is a deficient number, since it is larger than the sum of its proper divisors (1).

74666558620553 is an equidigital number, since it uses as much as digits as its factorization.

74666558620553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1088640000, while the sum is 68.

The spelling of 74666558620553 in words is "seventy-four trillion, six hundred sixty-six billion, five hundred fifty-eight million, six hundred twenty thousand, five hundred fifty-three".